Popup: The popup control is
a new primitive control in the WPF framework. It allows a container control
within the popup to suddenly appear when some action is taken.
Like the ToolTip, the Popup can
hold a single piece of content, which can include any WPF element. Also, like
the ToolTip, the content in the Popup can extend beyond the bounds of the
window. Within the popup control can be a container control, such as a grid,
with whatever content within that grid control it so chooses.
The Popup must be shown manually,
you may choose to create it entirely in code. However, you can define it just as
easily in XAML markup-just make sure to include the name property so you can
manipulate it in code.
Example of an Popup control
XMAL Code
<Window
x:Class="WpfApplication.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="WPF"
Height="150"
Width="250">
<StackPanel>
<Popup
AllowsTransparency="True"
Height="150"
HorizontalOffset="1cm"
Name="myPopup"
Placement="Right"
StaysOpen="True"
Width="250" >
<Border
BorderBrush="Black"
BorderThickness="3">
<DockPanel
Background="White"
LastChildFill="True">
<TextBlock
Background="LightBlue"
DockPanel.Dock="Top"
FontSize="15"
HorizontalAlignment="Stretch"
Margin="6"
Text="Popup" />
<Button
Click="btnClosePopup_Click"
Content="Close"
DockPanel.Dock="Bottom"
Margin="6"
HorizontalAlignment="Right"
MaxHeight="24"/>
</DockPanel>
</Border>
</Popup>
<StackPanel>
<StackPanel.Resources>
<Style
TargetType="{x:Type
Button}">
<Setter
Property="Margin"
Value="2"
/>
<EventSetter
Event="Click"
Handler="btnShowPopup_Click"
/>
</Style>
</StackPanel.Resources>
<Button
Content="Show
Popup"
Name="btnShowPopup"
/>
</StackPanel>
</StackPanel>
</Window>
VB.NET Code
Imports System
Imports
System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports
System.Windows
Imports
System.Windows.Controls
Imports
System.Windows.Data
Imports
System.Windows.Documents
Imports
System.Windows.Input
Imports
System.Windows.Media
Imports
System.Windows.Media.Imaging
Imports
System.Windows.Navigation
Imports
System.Windows.Shapes
Imports
System.Windows.Controls.Primitives
Namespace
WpfApplication
Partial Public
Class Window1
Inherits Window
Public Sub
New()
InitializeComponent()
End Sub
Private
Sub btnClosePopup_Click(ByVal
sender As Object,
ByVal e As
RoutedEventArgs)
myPopup.IsOpen = False
End
Sub
Private Sub
btnShowPopup_Click(ByVal sender
As Object,
ByVal e As
RoutedEventArgs)
myPopup.IsOpen = True
End
Sub
End Class
End
Namespace
Output window
Conclusion
Hope this article help you to
understand the working of Popup control in WPF.